2.5-way crossover design - diyAudio
Go Back   Home > Forums > Loudspeakers > Multi-Way

Multi-Way Conventional loudspeakers with crossovers

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 16th July 2008, 10:50 AM   #1
diyAudio Member
 
Join Date: Mar 2008
Default 2.5-way crossover design

Hi,
I'm building a pair of 2.5-way floorstanding speakers, sealed cabinet, each woofer with its own separate volume.

Cabinet is almost ready, except for the front baffle, now it's time to think at the preliminary crossover circuit.

I just want to know if calculating a normal 2-way circuit (with paralleled woofers, obvious) it's the correct working step, before thinking at the next inductor and other components for the 0.5 way.

Thanks
  Reply With Quote
Old 16th July 2008, 10:58 AM   #2
sreten is offline sreten  United Kingdom
diyAudio Member
 
Join Date: Nov 2003
Location: Brighton UK
Default Re: 2.5-way crossover design

Quote:
Originally posted by Puppetnation
Hi,
I'm building a pair of 2.5-way floorstanding speakers, sealed cabinet, each woofer with its own separate volume.

Cabinet is almost ready, except for the front baffle, now it's time to think at the preliminary crossover circuit.

I just want to know if calculating a normal 2-way circuit (with paralleled woofers, obvious) it's the correct working step, before thinking at the next inductor and other components for the 0.5 way.

Thanks
Hi,

No it is not. Its more like a normal 2 way that ignores
BSC with an extra driver added to implement the BSC.

Calculating a c/o ? sets the alarm bells ringing ......


http://www.rjbaudio.com/Audiofiles/FRDtools.html
http://www.geocities.com/woove99/Spkrbldg/

http://www.zaphaudio.com/
http://www.rjbaudio.com/projects.html
http://www.troelsgravesen.dk/Diy_Lou...r_Projects.htm
http://www.humblehomemadehifi.com/
http://htguide.com/forum/forumdisplay.php4?f=39

/sreten.
  Reply With Quote
Old 16th July 2008, 11:21 AM   #3
diyAudio Member
 
Join Date: Mar 2008
Default Re: Re: 2.5-way crossover design

Quote:
Originally posted by sreten
[Its more like a normal 2 way that ignores
BSC with an extra driver added to implement the BSC.
No parallelled woofers? I'm confused...
  Reply With Quote
Old 16th July 2008, 11:52 AM   #4
sreten is offline sreten  United Kingdom
diyAudio Member
 
Join Date: Nov 2003
Location: Brighton UK
Hi,

At the c/o point mid to treble you only have one active bass/mid unit.

/sreten.
  Reply With Quote
Old 16th July 2008, 12:29 PM   #5
diyAudio Member
 
Join Date: Mar 2008
Quote:
Originally posted by sreten
Hi,

At the c/o point mid to treble you only have one active bass/mid unit.

/sreten.
Ok Sreten, but my question was different:
I'd like to know if it's correct to start with a normal 2-way crossover layout (with 2 paralleled midwoofers, so calculate the LP inductor for 2 paralleled speakers) and THEN thinking at the additional 0.5 way components and BSC...

In a few words, can I imagine a normal 2-way crossover with 2 par. woofers and -only later- working at the second woofer circuitry?
Attached Images
File Type: gif 25steps.gif (2.7 KB, 677 views)
  Reply With Quote
Old 16th July 2008, 01:32 PM   #6
sreten is offline sreten  United Kingdom
diyAudio Member
 
Join Date: Nov 2003
Location: Brighton UK
Hi,

Like I said no its not. If the 2 way c/o design ignores BSC then
the 2.5 way design is a single MT 2-way with an added 0.5 driver.

You cannot start with a paralled MTM type 2-way crossover that
ignores BSC and then move on to implementing 0.5 way BSC
with the same crossover components and a 0.5 way inductor.
This should be blindingly obvious ........

/sreten.
  Reply With Quote
Old 16th July 2008, 01:40 PM   #7
diyAudio Member
 
Join Date: Mar 2006
Location: Bucharest
I second that, starting with two paralleled woofers in a 2 way crossover and then adding a 0.5 way on one will obviously mess things at the crossover point.

Starting with one woofer in a 2 way crossover and then adding the 0.5 way woofer makes more sense, although there is still a possibility to mess things at the crossover if the 0.5way woofer has still some output - in the end, the overall response must be considered.
__________________
I don't believe in audio believings.
  Reply With Quote
Old 16th July 2008, 02:48 PM   #8
diyAudio Member
 
Join Date: Mar 2008
Quote:
Originally posted by sreten
Hi,

Like I said no its not. If the 2 way c/o design ignores BSC then
the 2.5 way design is a single MT 2-way with an added 0.5 driver.

You cannot start with a paralled MTM type 2-way crossover that
ignores BSC and then move on to implementing 0.5 way BSC
with the same crossover components and a 0.5 way inductor.
This should be blindingly obvious ........

/sreten.
Ok, it's clear now.

Thanks
  Reply With Quote
Old 16th July 2008, 02:52 PM   #9
diyAudio Member
 
Join Date: Mar 2008
Quote:
Originally posted by bzfcocon
I second that, starting with two paralleled woofers in a 2 way crossover and then adding a 0.5 way on one will obviously mess things at the crossover point.

Starting with one woofer in a 2 way crossover and then adding the 0.5 way woofer makes more sense, although there is still a possibility to mess things at the crossover if the 0.5way woofer has still some output - in the end, the overall response must be considered.
I was believing , due to common designs have both woofers sharing the first LP stage, they were parallel (also if actually only in the overlapping freq. range), that's why...

Ok so I have to design something bigger than my hands can do...

thanks
  Reply With Quote
Old 16th July 2008, 05:14 PM   #10
Jay_WJ is offline Jay_WJ  United States
diyAudio Member
 
Join Date: Mar 2006
Location: Indiana
What kind of drivers are you working with?
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
How do you design a crossover?????? legendaryfrog Multi-Way 25 19th November 2006 10:23 PM
I need to design a crossover. j.burtt Multi-Way 3 11th May 2006 10:10 AM
crossover design keroo Multi-Way 1 1st May 2005 01:03 AM
crossover design Dave Jones Multi-Way 10 21st September 2003 08:38 PM
Crossover design Bose(o) Multi-Way 23 11th February 2002 08:22 AM


New To Site? Need Help?

All times are GMT. The time now is 07:01 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2